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Biological invaders run from A-Z

The Formosan termite is just one of hundreds
of biological invaders wreaking havoc on human
activity. From the Asian Tiger Mosquito to the Zebra Mussel,
invasive species are a growing threat around the nation and the world.
Read up on some of them, with accompanying photographs by Scott Threlkeld and G. Andrew Boyd, staff photographers at The Times-Picayune.